I seriously don't think you should send a letter, Future. The mere fact that you are willing to put words to paper, gives the impression of pursuit. If anything:
W, I have asked you several times to talk about our situation. You have ignored my request, so the next communication we will have (besides the children) will be my attorney who will start the process of finalizing our separation.
This is not what I wanted, but you have left me with no choice.
If your W cares about you at all, and has left OM, then she will be quick to answer this letter with shock. If she is only giving you the time of day because of the kids, and she's keeping you hanging for old times sake, she will hope you won't carry through and keep shaking you off. Don't ask her for time to talk again.
As a woman, the fact that 'feelings' are not mentioned would devastate me. Perhaps, she is the same? We women pick up on that very quickly.
Good luck.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim